The Advanced Placement Teacher Investment Program in Indiana (AP-TIP IN) program trains teachers to prepare students for college with rigorous math, science, and English coursework using the College Board Advanced Placement Program®. The program's goals are to increase enrollment in math, science, and English Advanced Placement® courses, and increase the number of qualifying scores on AP® exams; subsequently, improved performance in these exams should lead to better postsecondary outcomes. We use comparative interrupted time series models to compare program schools and matched comparison schools and find that AP-TIP IN schools increased the proportion of students taking and passing AP exams, while post-secondary outcomes were similar to matched comparison schools.